High Effi ciency Boost Converter for up to 10 LEDs

Description The SC4540 is designed to regulate current for a series string of white LEDs in LCD backlighting applications where small size and high efficiency are priorities. This device integrates an 800kHz current-mode PWM boost converter and a 30mA programmable low dropout current sink regulat

文件：282.89 Kbytes 页数：15 Pages

SEMTECH

先之科

High Efficiency Boost Converter for up to 10 LEDs

The SC4540 is designed to regulate current for a series string of white LEDs in LCD backlighting applications where small size and high effi ciency are priorities. This device integrates an 800kHz current-mode PWM boost converter and a 30mA programmable low dropout current sink regulator. ·Input voltage range — 4.5V to 12V\n·Programmable LED current up to 30mA\n·Current-mode PWM control — 800kHz\n·Soft-start to reduce in-rush current\n·PWM dimming — 100Hz to 50kHz\n·PWM dimming at ISET — analog and fi ltered\n·Over-voltage protection — 38V (minimum)\n·Under-voltage lockout (UVLO)\n·T;

Semtech

先之科

High Effi ciency Boost Converter for up to 10 LEDs

Description The SC4540 is designed to regulate current for a series string of white LEDs in LCD backlighting applications where small size and high efficiency are priorities. This device integrates an 800kHz current-mode PWM boost converter and a 30mA programmable low dropout current sink regulat

文件：282.89 Kbytes 页数：15 Pages

SEMTECH

先之科

High Effi ciency Boost Converter for up to 10 LEDs

Description The SC4540 is designed to regulate current for a series string of white LEDs in LCD backlighting applications where small size and high efficiency are priorities. This device integrates an 800kHz current-mode PWM boost converter and a 30mA programmable low dropout current sink regulat

文件：282.89 Kbytes 页数：15 Pages

SEMTECH

先之科

Package：8-UFDFN 裸露焊盘；包装：卷带（TR） 类别：集成电路（IC） LED 驱动器 描述：IC LED DRVR RGLTR PWM 30MA 8MLPD

SEMTECH

先之科